Van der Waals heterostructures
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TLDR
With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.Abstract:
Fabrication techniques developed for graphene research allow the disassembly of many layered crystals (so-called van der Waals materials) into individual atomic planes and their reassembly into designer heterostructures, which reveal new properties and phenomena. Andre Geim and Irina Grigorieva offer a forward-looking review of the potential of layering two-dimensional materials into novel heterostructures held together by weak van der Waals interactions. Dozens of these one-atom- or one-molecule-thick crystals are known. Graphene has already been well studied but others, such as monolayers of hexagonal boron nitride, MoS2, WSe2, graphane, fluorographene, mica and silicene are attracting increasing interest. There are many other monolayers yet to be examined of course, and the possibility of combining graphene with other crystals adds even further options, offering exciting new opportunities for scientific exploration and technological innovation. Research on graphene and other two-dimensional atomic crystals is intense and is likely to remain one of the leading topics in condensed matter physics and materials science for many years. Looking beyond this field, isolated atomic planes can also be reassembled into designer heterostructures made layer by layer in a precisely chosen sequence. The first, already remarkably complex, such heterostructures (often referred to as ‘van der Waals’) have recently been fabricated and investigated, revealing unusual properties and new phenomena. Here we review this emerging research area and identify possible future directions. With steady improvement in fabrication techniques and using graphene’s springboard, van der Waals heterostructures should develop into a large field of their own.read more
Citations
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Journal ArticleDOI
Magnetism in two-dimensional van der Waals materials.
TL;DR: These cleavable materials provide the ideal platform for exploring magnetism in the two-dimensional limit, where new physical phenomena are expected, and represent a substantial shift in the authors' ability to control and investigate nanoscale phases.
Journal ArticleDOI
Tunable Phonon Polaritons in Atomically Thin van der Waals Crystals of Boron Nitride
Siyuan Dai,Zhe Fei,Qiong Ma,Aleksandr Rodin,Martin Wagner,Alexander McLeod,Mengkun Liu,Will Gannett,Will Gannett,William Regan,William Regan,Kenji Watanabe,Takashi Taniguchi,Mark H. Thiemens,Gerardo Dominguez,Gerardo Dominguez,A. H. Castro Neto,A. H. Castro Neto,Alex Zettl,Alex Zettl,Fritz Keilmann,Pablo Jarillo-Herrero,Michael M. Fogler,Dimitri Basov +23 more
TL;DR: The measured dispersion of polaritonic waves was shown to be governed by the crystal thickness according to a scaling law that persists down to a few atomic layers, likely to hold true in other polar van der Waals crystals and may lead to new functionalities.
Journal ArticleDOI
Strong interlayer coupling in van der Waals heterostructures built from single-layer chalcogenides
Hui Fang,Corsin Battaglia,Carlo Carraro,Slavomír Nemšák,Burak Ozdol,Burak Ozdol,Jeong Seuk Kang,Hans A. Bechtel,Sujay B. Desai,Florian Kronast,Ahmet Unal,G. Conti,C. Conlon,Gunnar K. Pálsson,Michael C. Martin,Andrew M. Minor,Andrew M. Minor,Charles S. Fadley,Eli Yablonovitch,Roya Maboudian,Ali Javey +20 more
TL;DR: Artificial semiconductor heterostructures built from single-layer WSe2 and MoS2 observe a large Stokes-like shift of ∼100 meV between the photoluminescence peak and the lowest absorption peak that is consistent with a type II band alignment having spatially direct absorption but spatially indirect emission.
Journal ArticleDOI
High electron mobility, quantum Hall effect and anomalous optical response in atomically thin InSe
Denis A. Bandurin,Anastasia V. Tyurnina,Anastasia V. Tyurnina,Geliang Yu,Artem Mishchenko,Viktor Zólyomi,Sergey V. Morozov,Roshan Krishna Kumar,Roman V. Gorbachev,Zakhar R. Kudrynskyi,Sergio Pezzini,Zakhar D. Kovalyuk,Uli Zeitler,Konstantin S. Novoselov,Amalia Patanè,Laurence Eaves,Irina V. Grigorieva,Vladimir I. Fal'ko,Andre K. Geim,Yang Cao +19 more
TL;DR: Encapsulated 2D InSe expands the family of graphene-like semiconductors and, in terms of quality, is competitive with atomically thin dichalcogenides and black phosphorus.
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Polaritons in layered two-dimensional materials
Tony Low,Andrey Chaves,Joshua D. Caldwell,Anshuman Kumar,Anshuman Kumar,Nicholas X. Fang,Phaedon Avouris,Tony F. Heinz,Francisco Guinea,Francisco Guinea,Luis Martín-Moreno,Frank H. L. Koppens,Frank H. L. Koppens +12 more
TL;DR: The emerging field of 2D material polaritonics and their hybrids provide enticing avenues for manipulating light-matter interactions across the visible, infrared to terahertz spectral ranges, with new optical control beyond what can be achieved using traditional bulk materials.
References
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